Effects of ultraviolet radiation on locomotion and orientation in roughskin newts (Taricha granulosa)

Citation
Ar. Blaustein et al., Effects of ultraviolet radiation on locomotion and orientation in roughskin newts (Taricha granulosa), ETHOLOGY, 106(3), 2000, pp. 227-234
Citations number
34
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Animal Sciences","Neurosciences & Behavoir
Journal title
ETHOLOGY
ISSN journal
0179-1613 → ACNP
Volume
106
Issue
3
Year of publication
2000
Pages
227 - 234
Database
ISI
SICI code
0179-1613(200003)106:3<227:EOUROL>2.0.ZU;2-M
Abstract
Environmental changes, including those associated with the atmosphere may s ignificantly affect individual animals and ultimately populations. Ultravio let (UV) radiation, perhaps increasing due to stratospheric ozone depletion , has been linked to mortality in a number of organisms, including amphibia ns. The eggs and larvae of certain amphibian species hatch at significantly lower rates when exposed to ambient ultraviolet light. Yet little is known about the sublethal effects of UV radiation. For example, UV radiation may affect specific behaviors of an animal that could alter its ability to sur vive. To examine if UV radiation affects amphibian behavior, we used roughs kin newts (Taricha granulosa) as a model. Newts were exposed to low-level d oses of UV in the laboratory and then tested in the field to examine if UV- exposed and control (no UV) newts differed in orientation towards water or in locomotor activity levels. UV-exposed and control newts both exhibited a significant orientation towards water in field tests but there was no sign ificant difference in orientation between treatments. However, UV-exposed n ewts were significantly more active than control newts. Our results suggest that exposure to short-term low levels of UV radiation alters certain beha viors. Environmentally induced changes in behavior may have significant eco logical and evolutionary consequences.